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879 Matching Results
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A 30 ps Timing Resolution for Single Photons with Multi-pixel Burle MCP-PMT
We have achieved {approx}30 psec single-photoelectron and {approx}12ps for multi-photoelectron timing resolution with a new 64 pixel Burle MCP-PMT with 10 micron microchannel holes. We have also demonstrated that this detector works in a magnetic field of 15kG, and achieved a single-photoelectron timing resolution of better than 60 psec. The study is relevant for a new focusing DIRC RICH detector for particle identification at future Colliders such as the super B-factory or ILC, and for future TOF techniques. This study shows that a highly pixilated MCP-PMT can deliver excellent timing resolution.
Date:
July 5, 2006
Creator:
Va'vra, J.; Benitez, J.; Coleman, J.; Leith, D. W. G. S.; Mazaheri, G.; Ratcliff, B. et al.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 35, No. 30, Ed. 1 Friday, May 5, 2006
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
May 5, 2006
Creator:
Waltman, Erin
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
1996-2004 Trends in the Single-Family Housing Market: Spatial Analysis of the Residential Sector
This report provides a detailed geographic analysis of two specific topics affecting the residential sector. First, we performed an analysis of new construction market trends using annual building permit data. We report summarized tables and national maps to help illustrate market conditions. Second, we performed a detailed geographic analysis of the housing finance market. We analyzed mortgage application data to provide citable statistics and detailed geographic summarization of the residential housing picture in the US for each year in the 1996-2004 period. The databases were linked to geographic information system tools to provide various map series detailing the results geographically. Looking at these results geographically may suggest potential new markets for TD programs addressing the residential sector that have not been considered previously. For example, we show which lenders affect which regions and which income or mortgage product classes. These results also highlight the issue of housing affordability. Energy efficiency R&D programs focused on developing new technology for the residential sector must be conscious of the costs of products resulting from research that will eventually impact the home owner or new home buyer. Results indicate that home values as a proportion of median family income in Building America communities are …
Date:
September 5, 2006
Creator:
Anderson, Dave M. & Elliott, Douglas B.
Object Type:
Report
System:
The UNT Digital Library
A1 - Base Input
Contains base input from Fort Monroe, VA
Date:
January 5, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Ab Initio Studies of Coke Formation on Ni Catalysts During Methane Reforming
The atomic-scale processes that control the formation of carbon deposits on Ni catalysts in reforming applications are poorly understood. Ab initio Density Functional Theory calculations have been used to examine several key elementary steps in the complex network of chemical reactions that precedes carbon formation on practical catalysts. Attention has been focused on the disproportionation of CO. A comparative study of this reaction on flat and stepped crystal planes of Ni has provided the first direct evidence that surface carbon formation is driven by elementary reactions occurring at defect sites on Ni catalysts. The adsorption and diffusion of atomic H on several flat and stepped Ni surfaces has also been characterized experimentally.
Date:
March 5, 2006
Creator:
Sholl, David S.
Object Type:
Report
System:
The UNT Digital Library
[Abilene City Council Minutes: 2006]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January 5, 2006 to December 21, 2006.
Date:
2006-01-05/2006-12-21
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
ACCUMULATION OF RADIOCESIUM BY MUSHROOMS IN THE ENVIRONMENT: A LITERATURE REVIEW AND IMAGE GALLERY
During the last 50 years, a large amount of information on radionuclide accumulators or 'sentinel-type' organisms in the environment has been published. Much of this work focused on the risks of food-chain transfer of radionuclides to higher organisms such as reindeer and man. However, until the 1980's and 1990's, there has been little published data on the radiocesium ({sup 134}Cs and {sup 137}Cs) accumulation by mushrooms. This presentation will consist of a review of the published data for {sup 134,137}Cs accumulation by mushrooms in nature. The review will consider the time of sampling, sample location characteristics, the radiocesium source term and other aspects that promote {sup 134,137}Cs uptake by mushrooms. This review will focus on published data for mushrooms that demonstrate a large propensity for use in the environmental biomonitoring of radiocesium contamination. It will also provide photographs and descriptions of habitats for many of these mushrooms to facilitate their collection for biomonitoring.
Date:
November 5, 2006
Creator:
Duff, M & Mary Ramsey, M
Object Type:
Article
System:
The UNT Digital Library
Adaptation of subsurface microbial communities to mercury
This report gives information about the Adaptation of subsurface microbial communities to mercury.
Date:
April 5, 2006
Creator:
Sorensen, Soren J.
Object Type:
Presentation
System:
The UNT Digital Library
AF23 - Base Input
Contains base input for Keesler AFB, MS
Date:
January 5, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
AF6 - Base Input
Contains base input from Otis Air Force Base, MA
Date:
January 5, 2006
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
AF8 - Media Briefing Book
Contains media briefing book for Hill Air Force Base, UT
Date:
January 5, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Book
System:
The UNT Digital Library
Agricultural Biotechnology: Background and Recent Issues
Since the first genetically engineered (GE) crops (also called GM [genetically modified] crops, or GMOs, genetically modified organisms) became commercially available in the mid-1990s, U.S. soybean, cotton, and corn farmers have rapidly adopted them. As adoption has spread, there have been policy debates over the costs and benefits of GE products. Issues include the impacts of GE crops on the environment and food safety, and whether GE foods should be specially labeled. Congress generally has been supportive of GE agricultural products, although some Members have expressed wariness about their adoption and regulation. The 109th Congress will likely continue to follow trade developments, particularly the U.S.-EU dispute, as well as U.S. regulatory mechanisms for approving biotech foods.
Date:
September 5, 2006
Creator:
Becker, Geoffrey S. & Cowan, Tadlock
Object Type:
Report
System:
The UNT Digital Library
AIDS in Africa
Sub-Saharan Africa has been far more severely affected by AIDS than any other part of the world. The United Nations reports that 25.8 million adults and children are infected with the HIV virus in the region, which has about 11.3% of the world's population but more than 64% of the worldwide total of infected people. This report discusses this issue in detail, including the cause of the African AIDS epidemic, the social and economic consequences, response and treatment, and U.S. policy.
Date:
May 5, 2006
Creator:
Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
Air Force Aerial Refueling Methods: Flying Boom versus Hose-and-Drogue
Decisions on the composition of the Air Force aerial refueling fleet were made decades ago, when the primary mission was to refuel long-range strategic bombers. Modifications have been made to many of these tanker aircraft (KC-135s and KC-10s) to make them more effective in refueling fighter aircraft. This report examines the balance between two different refueling methods in today's refueling fleet -- "flying boom" and "hose-and-drogue."
Date:
June 5, 2006
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Air Force Aerial Refueling Methods: Flying Boom Versus Hose-and-Drogue
This report considers the refueling fleet for the Air Force. The report examines two different refueling methods.
Date:
June 5, 2006
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Air Force FB-22 Bomber Concept
The Air Force has expressed interest in developing a bomber variant of the F-22A Raptor to "bridge the gap" between today's bombers and a follow-on bomber in 2037. Questions exist regarding the FB-22's feasibility, cost, and combat potential.
Date:
June 5, 2006
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 130, No. 32, Ed. 1 Thursday, January 5, 2006
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
January 5, 2006
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Albany News (Albany, Tex.), Vol. 131, No. 19, Ed. 1 Thursday, October 5, 2006
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
October 5, 2006
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
All One-loop Maximally Helicity Violating Gluonic Amplitudes in QCD
We use on-shell recursion relations to compute analytically the one-loop corrections to maximally-helicity-violating n-gluon amplitudes in QCD. The cut-containing parts have been computed previously; our work supplies the remaining rational parts for these amplitudes, which contain two gluons of negative helicity and the rest positive, in an arbitrary color ordering. We also present formulae specific to the six-gluon cases, with helicities (-+-+++) and (-++-++), as well as numerical results for six, seven, and eight gluons. Our construction of the n-gluon amplitudes illustrates the relatively modest growth in complexity of the on-shell-recursive calculation as the number of external legs increases. These amplitudes add to the growing body of one-loop amplitudes known for all n, which are useful for studies of general properties of amplitudes, including their twistor-space structure.
Date:
July 5, 2006
Creator:
Berger, Carola F.; Bern, Zvi; Dixon, Lance J.; Forde, Darren & Kosower, David A.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 107, No. 234, Ed. 1 Thursday, January 5, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 5, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 260, Ed. 1 Sunday, February 5, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 5, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 284, Ed. 1 Sunday, March 5, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
March 5, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 310, Ed. 1 Wednesday, April 5, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 5, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Altus Times (Altus, Okla.), Vol. 107, No. 336, Ed. 1 Friday, May 5, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 5, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History